21888

Appears in sequences

• Numbers that are the sum of 3 positive cubes in exactly 3 ways.at n=11A025397
• Numbers that are the sum of 3 positive cubes in 3 or more ways.at n=12A025398
• Numbers that are the sum of 3 distinct positive cubes in exactly 3 ways.at n=9A025401
• Numbers that are the sum of 3 distinct positive cubes in 3 or more ways.at n=10A025402
• Theta series of 8-dimensional strongly 6-modular lattice O(6) with minimal norm 3.at n=38A029720
• Coordination sequence for lattice D*_4 (with edges defined by l_1 norm = 1).at n=16A035471
• a(n) = Sum_{d|n, n/d=1 mod 4} d^3 - Sum_{d|n, n/d=3 mod 4} d^3.at n=27A050471
• Numbers k such that 2*7^k - 3 is prime.at n=7A059077
• a(n) = n! * (sum of reciprocals of parts in all partitions of n into distinct parts).at n=6A103738
• a(n) = 16*n*(n+2).at n=36A114444
• G.f. satisfies A(x) = 1 + x*A(2*x)^2.at n=5A135867
• a(n) = 1458*n + 18.at n=14A157505
• a(n) = a(n-1) + a(n-2) + 4, with a(0)=0, a(1)=2.at n=18A168193
• Least value x solving x^2 - y^2 = n!at n=8A181896
• Numbers with prime factorization pq^2r^7.at n=7A190466
• Numbers that can be expressed as the sum of three nonnegative cubes in three ways.at n=15A219329
• Number of (n+1) X (1+1) 0..4 arrays with every 2 X 2 subblock having the sum of the squares of all six edge and diagonal differences equal to 11.at n=4A234210
• Number of (n+1)X(5+1) 0..4 arrays with every 2X2 subblock having the sum of the squares of all six edge and diagonal differences equal to 11.at n=0A234214
• T(n,k)=Number of (n+1)X(k+1) 0..4 arrays with every 2X2 subblock having the sum of the squares of all six edge and diagonal differences equal to 11 (11 maximizes T(1,1)).at n=14A234217
• T(n,k)=Number of (n+1)X(k+1) 0..4 arrays with every 2X2 subblock having the sum of the squares of all six edge and diagonal differences equal to 11 (11 maximizes T(1,1)).at n=10A234217